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used when the subject and object of the sentence are the same, indicating that the action is done to oneself
自分自身（じぶんじしん）, 自己（じこ）
used when a person who is addressed is both the one who does an action and the one who receives the action
あなた自身, 自分自身
used when both the subject and object of the sentence or clause refer to a male human or animal who is being talked about
彼自身, 彼を自分で
used when a female human or animal is both the one who does an action and the one who is affected by the action
彼女自身（かのじじしん）, 自分自身（じぶんじしん）
used when an animal or object is both the thing that does an action and the thing that the action is done to
自体, 本体
used when the speaker and one or more other people are both the ones who do an action and the ones who are affected by it
私たち自身, 私たち自ら
used when a group of people who are being addressed are both the ones who do an action and the ones that are affected by it
あなたたち自身を, 皆さん自身を
used when a group of people or animals are both the ones who do an action and the ones who are affected by it
彼ら自身, 彼らは自分たち
